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Finding the Fourth Proportional to 134,107.60, 200,869.80 and 81,425.20

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Solution

The fourth proportional to 134,107.60, 200,869.80 and 81,425.20 is: 121,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,107.60 : 200,869.80 = 81,425.20 : x
  2. Step 2: Convert to fraction form
    134,107.60/200,869.80 = 81,425.20/x
  3. Step 3: Cross multiply
    134,107.60x = 200,869.80 × 81,425.20
  4. Step 4: Simplify right side
    134,107.60x = 16,355,863,638.96
  5. Step 5: Solve for x
    x = 16,355,863,638.96/134,107.60
  6. Step 6: Final answer
    x = 121,960.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.